(19)

(11)

EP 0 126 133 A1

(12)

(43) Date of publication: 28.11.1984 Bulletin 1984/48 (21) Application number: 83903816.0 (22) Date of filing: 23.11.1983

(51) International Patent Classification (IPC):  B23K 9/ 02( . ) B23K 9/ 12( . ) (86) International application number: PCT/GB1983/000301 (87) International publication number: WO 1984/002099 (07.06.1984 Gazette 1984/14)

(84) Designated Contracting States: CH DE FR GB LI NL SE (30) Priority: 30.11.1982 GB 19820034109 (71) Applicant: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and London SW1A 2HB (GB)	(72) Inventor: BAXTER, Christopher, Francis, George Cambridge, CB1 2PZ (GB) (74) Representative: Beckham, Robert William, et al  Defence Research Agency Intellectual Property Department DRA Farnborough Farnborough, Hants. GU14 6TD Farnborough, Hants. GU14 6TD (GB)